Global Navigation System

Question 1

What are some Scientific Applications of GNSS

Answer 1

• Plate Motion
• Continental Drift
• Earthquakes

Question 2

What was the first artificial satellite and when was it put into orbit?

Answer 2

Suputnik 1 in 1957

Question 3

What is TRANSIT and when was it developed?

Answer 3

Doppler based satellite navigation system, 1958

Question 4

What is NAVSTAR Global Positioning System

Answer 4

Important Program in history of GNS

Question 5

How is signal travel time determined??

Answer 5

By replicating the satellite code sequence on the local device

Question 6

What is the basic setup of the GPS constellation?

Answer 6

6 orbit planes
4 satellites per orbit
about 20,000 km height

Question 7

What is the basic setup of the Galileo Constellation?

Answer 7

3 planes
8 satellites per plane
23,000 km height

Question 8

Name GNSS Systems of each nation

Answer 8

GPS - Merica
GLONASS- Russia
Galileo - EU
BeiDou - China

Question 9

How many GPS satellites does the U.S. have ?

Answer 9

32

Question 10

What in Interoperability?

Answer 10

Signals from different systems being used together

Question 11

What is compatibility?

Answer 11

Signals from different systems designed so they don’t interfere with each other

Question 12

What is integrity?

Answer 12

Measure of correctness of system

Question 13

How can different signals differ?

Answer 13

Modulation: energy and polarization